I have always regular period and last month i have some infection so i have taken antibiotics(levofloxacin n scinidazole).after taking this medicine my period was delay (after 7dys).i was trying to conception but coudnt b sucess now this month i had regular sex still 14 dys frm period date but in my period day ,bleeding occurs at night time in a small amont it was very lighting but till now (24hr)no bleeding occurs n i havent any related symptoms?